Layout of the original iPhone 5 logic board in .bvr boardview format, 264 KB. The name lists only the model, not a board number, revision or regional version, so verify that component positions match the board being repaired. A boardview shows every part, its designator and the nets it joins, which helps when tracing a rail, locating a capacitor on a shorted line or finding a test pad near a connector. Use it with a viewer that supports BVR files, ideally alongside a schematic for signal names and expected voltages.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .bvr file
Text boardview from the BoardView R family of tools, seen for Lenovo, MSI and Clevo boards.